<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>二级菜单</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <nav>
        <ul class="menu">
            <li>奶茶</li>
            <li>果茶</li>
            <li class="menu-item-with-children">
                咖啡
                <ul class="submenu">
                    <li>美式咖啡</li>
                    <li>拿铁咖啡</li>
                    <li>摩卡咖啡</li>
                </ul>
            </li>
        </ul>
    </nav>
</body>
</html>